Key benefits

• Delivers 500 mg of L-Tryptophan in every capsule.

• Essential amino acid—your body can’t make it on its own.

• Formulated without common allergens for peace of mind.

NOW Foods L-Tryptophan 500mg offers a straightforward way to add this essential amino acid to your day. Each capsule provides 500 mg of free-form L-Tryptophan, a building block your body needs but can only get from food or supplements. Carefully tested for quality and purity, this formula is free from wheat, gluten, soy, milk, egg, fish, shellfish, tree nut, and sesame—making it a versatile choice for a range of dietary needs.

Empowering healthier lives since 1968, NOW Foods began when Elwood Richard, a physical chemist, launched Health House, a chain of health food stores in Chicago. Inspired by his research on physical performance through nutrition, Elwood saw the need for affordable natural products. Facing competition from local supermarkets, he founded his own manufacturing company, ensuring cost-effective, high-quality health foods. NOW Foods, still family-owned, has since become a leading brand in the natural product industry, offering an extensive line of affordable, top-quality products. Elwood's vision of accessible health foods continues to drive the company today.

With our Healf Curation Process, we do the work for you. Shop with confidence knowing that every item has been tried, tested, and curated for you.

Learn more about each step—Brand Discovery, Expert Validation, and Community Testing—here.

L-Tryptophan (Free-Form) (1 g), Hypromellose (Cellulose Capsule), Rice Flour, Antioxidant (Ascorbyl Palmitate), Anti-Caking Agent (Stearic Acid (Vegetable Source))

Take 1-2 capsules 2 to 3 times daily on an empty stomach, with final dose at bedtime, or as directed by your physician.

Store in a cool, dry place after opening.

For adults only. Consult physician if pregnant/nursing, taking medication (especially antidepressants such as SSRIs and MAOIs), or have a medical condition. May cause drowsiness. Do not use with alcoholic beverages or while operating heavy machinery. Keep out of reach of children.

Additional Information:

Food supplements and foods sold by Healf should not be used as a substitute for a varied, balanced diet and healthy lifestyle.

If you are pregnant, breastfeeding, have a medical condition, or are taking any medications, please consult with a healthcare professional before use. Use products only if the seal is intact. Store in a cool, dry place, out of the reach of young children. Do not exceed the recommended daily intake.

We make every effort to ensure that product information on our website is accurate and up to date, but packaging and ingredients may occasionally vary from images shown on site. Please refer to the product label and contact Healf before use if you have any questions regarding your specific allergies or intolerances.